On a particular evening a business man decides to work for some hours at his office in London because his wife gets out with her friends. After some hard work he opens the curtains of his office and looks outside (see the picture), but immediately he gets in panic. Why?

Best Bus, a bus company from Austin Texas would like to acquire a new bus. Somebody working at Best Bus found a nice second hand bus at Ebay (see the picture) for a reasonable price. When the president of the company sees the picture: "Yes man, this is a nice good looking bus, and pretty cheap too, but think man I never can satisfy my customers with such a bus." Why not?

What goes up the chimney down, but can't go down the chimney up?